Grinding-machine.



A. B. LANDIS.

GRINDING MACHINE.

APPLICATION FILED APILZB, 1906.

1,018,392. I Patented Feb. 20,1912.

77L uz M Jltorney A. B. 'LANDIS. GRINDING MACHINE. APPLIOATION'PILEDAPR.2H, 1906.

. ,01 ,399; Patented Feb.20, 1912.

9 SHEETS-SHEET 2.

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A. B. LANDIS.

- GBINDINGMAGHINE. APPLICATION FILED APR. 26, 1906' 1,018,392. Patentzed Feb. 20, 1912.

I wifmoaa A. B. LANDIS.

GRINDING MACHINE.

nrmouxoxrunn APR. 26, 1906.

Patented Feb.' 20, 1912.

9 SHEETS-SHEET 5.

- A. B. LANDIS.

GRINDING MACHINE.

APPLICATION FILED APR. 26, 1906.

Patented Feb. 20, 1912.

9 SHEETS-SHEET 6.

WITNESSES: I NVENTOR Attorney A. -B; LANDIS.

GRINDING MACHINE. APPLICATION FILED APR. 26, 1906.

1,018,392. Patented Feb. 20, 1912.

9 SHEETS-SHEET 7.

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A. B. LANDIS. GRINDING MACHINE.

APPLICATION FILED APR. 26, 1906.

"" 1,018,392. Patented Feb. 20, 1912.

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. GRINDING mcnmn. APPLICATION FILED APR. 26, 1906.

1,018,392, Patented Feb. 20, 1912. V I I D SHEETS-SHEET ll.

ABRAHAM B. LANDIS, OF WAYNESBORO, PENNSYLVANIA.

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Specification of Letters Patent.

Patented Feb. 20,1912.

Application filed April 28, 1906. Serial No. 318,784.

To all whom it may concern:

Be it known that I, ABRAHAM B. LANDTS, a citizen of the United States,residing at Waynesboro, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Im rovements inGrinding-Machines, of whic the following is a specification. a

The object of my said invention is to provide a grindin machine, thedriving mechanism whereo for all its parts shall be mounted directlyupon the machine, making a self-contained drive and obviating the use ofoverhead shaftin and belting, and it consists in an endless elt mountedupon stationary driving pulleys mounted on the frame of said machine andconnected with the traveling grinding wheel carriagein such a manner asto permit said carriage .to travel freely to traverse 'the work and theslider'to move freely toward and from the work without affecting thetension or the operation of said gear, all as will be hereinafter morefully described and claimed.

Referring to the accompanying drawings which are made a part hereof andon which similar reference characters indicate similar parts, Figure 1is a perspective view of a machine embodying my said invention show-'ing the rear and top thereof, Fig. 2 a rear elevation of thesame, Fig. 3a top or plan view of the ri ht-hand end of the machine, 'as shown inig. 2, but. viewed from its opposite side, Fig. 3 a similar view of theleft-hand end, Fig. 4 an 'end elevation as seen when looking in thedirection'indicated b the arrows-on the dotted line 44 in ig. 2, Fig. 5a rear elevation of the centrally mounted grooved pulleys on thecarriage, Fig. .6 a side elevation of the same, Fig. 7 a cross sectionon the dotted line 77 in Fig. 3 on an enlarged scale, Fig. 8 a

similar view on the dotted line 88 in Fig.

3, andFig. 9 a section on the dotted line 9.-9 in Fig. 8, on an enlargedscale.

In said drawings the portions marked A represent the mam bed of themachine, B the work supporting table and C the grinding wheel carriage.

he main bed A is a casting of suitable form to supportthe several otherparts and needs no special description.

The work-supporting table B has the thereon and the several partscarried thereby are driven and arranged to support and drive the work inthe usual or any approriatemanner. As shown, the head-stock is drivenfrom the main driving shaft 9 through a belt 80 running from a' pulley81 on its outer end around idler pulleys 82 set in-a' horizontalposition in a suitable frame83 and passing over a cone pulley 84 on acounter-shaft 85 set in suitable bearings 86 at right-angles with saidshaft 9. A belt 87 runs from one face of the conepulley 84 to acone-pulley 88 on another counter-shaft 89 on the opposite side of themachine, and another belt 90 runs from said cone-pulley 88 to a pulley91 on the shaft 92 on the'top of the head-stock structure; A gear wheel93 on the opposite end of said shaft 92 meshes with a gear on theperiphery of the facelate 94 of the head-stock.

The grin ing wheel carriage C is mounted to travel back and forth on thetrack provided therefor on the main bed of the machine and has atransverse slider C mounted thereon, carrying the grinding wheel baseand grinding wheel W in the usual manner. Said grinding wheel W ismounted upon a spindle G having a grooved pulley c mounted thereontoreceive the ropes constituting the lielt drive. On the rear side ofsaid carriage Care mounted brackets c in which are pro vided journalbearings in which vertical "head-stock B and foot-stock B mounted shafts0 and c are mounted, said vertical shafts having a grooved pulley c and0 respectively at the upper end and a similar pulley 0* and c.respectivel at the lower end. A bracket A projects rom one end of themachine, in which is mounted a pivoted yoke A carrying the shaft a, onwhich is mounted a grooved pulley a. On the'opposite end of the frame issecured a bracket A having a pivoted yoke A thereon, which has a shafta? at its upper end, on which is mounted a grooved pulley a". The lowerends of said yokes A and A are 'oined by rods (1 and a flexible chain aw ich connects the inner ends of said rods and passes over idle pulleysa on the rear of the bed and under a pulley a mounted on a shaft in abracket on the top of a weight A, which is thus suspended on said chain.A yokeshaped bracket A is mounted on the top of bracket A and hasbearings formed in its upper end, in which is mounted a shaft 1. Asimilar bracket A is mounted on the top of bracket A at the other end ofthe machine and has bearings at its upper end, in which is journaled ashaft 2. A distance rod A is mounted between said brackets A and A" tobrace them apart and take the strain caused by the pull on the beltsmounted thereon. a

On shaft 1 is mounted a belt pulley 3 and on shaft 2 is mounted a beltpulley f, said pulleys 3 and 4 being connected b a driving belt 5,crossed between said pullii s to drive said shafts 1 and 2 in oppositeirections. Another pulley 6 is mounted on the op osite end of said shaft1 and is geared by bet 7 with a pplley 8 on a shaft 9 driven by a motormounted at the end of the machine. A grooved pulley 10 is mounted uponsaid shaft 1 and a grooved pulley 11 upon shaft 2. Pulleys 3 and 10 onshaft 1 are mounted loosely and connected by a differential gearcomprising beveled gears 12, mounted in mortises in a disk 14 uponradial studs 13. Said disk 14 is secured upon said. shaft 1 between saidpulleys 3 and 10 and said studs 13 are secured in place by screws 15extending through screw-threaded perforations. in the rim of disk 14against the sides of said studs. By means of this arrangement, the driveupon each shaft 1 and 2 through the belt 5 is made even, re ardless ofthe travel of the grinding whee carriage in either direction, as will bepresently more fully described.

There are two rope 'belts 16 and 17, each of which are doubled so thattwo or more:

strands run parallel and to ether. Belt 16 course of these is mounted onpulley a an passes over the horizontal pulley oon the upper end of thevertical shaft from thence over the top of pulley c of the grindingwheel spindle C .then back around pulley 0* on the lower end of shaft 0,thence toward the opposite end of the machine and under and aroundpulley 11 on shaft 2 and back to the underside of pulley a. Belt 17 ismount-' ed upon pulley a runs to pulley c on the upper end of verticalshaft 0', thence passes down over and around the pulley c of thegrinding wheel spindle G back around pule c on the lower end of verticalshaft 0 thence to theother end of the machine and around pulley 10 'onshaft 1, thence back to the underside of pulley a. It will beunderstood, of course that in thus traci the belts, it is not inten edto mean that either belt begins or ends' at any particular point,inasmuch as they are, both endless belts and each are mounted in anidentical manner to driveupon the pulley 0 power shaft, and a ro eof thegrinding wheel spindle from the shafts 1 and 2 respectively, the powerbeing transmitted to shaft 1 by the belt 7 from the motor shaft 9 andfrom shaft 1 to shaft 2 through the belt 5 and transmitted from saidshafts 1 and 2 to the grindin wheel spindle by means of the belts 16 an17, as just described. By this arran ement a drive for thegrinding'wheel s in e is provided which is not only entire y containedupon the machine, but one in which the strain is e ualized in bothdirections upon the mechanism which drives the grinding whee'l carriageto traverse the grinding wheel across the work, permitting said carriageto travel back and forth without interfering with the true adjustmentand accurate work of the grinding wheel. The pivoted yoke-frames a and acarrying the pulleys a and a" being connected by the flexible connectionto the weight A operates to hold the rope belts under a uniform tensionregardless of the travel of the slider carrying the grinding wheeltoward and from the work, and the compensating gear on shaft 1, abovedescribed serves to allow either belt 16 or 17 to vary in speed thatdegree necessary to compensate for the motion of the carriage inwhichever'direction it may be moving, as will be readily understood.

It will be observed that each endless belt from the ends of the machineto the grinding wheel can be used single or in multiple to any number ofstrands desired. As here shown the strands or ropes are'double but thenumber can readily be increased to 3, 4, 5 or any number necessary forthe transmiss'ion of such power as required by different sized machineswithout making said rope heavier than would be used on small machines,which enables the same flexibility and ease of operation to bemaintained in all machines.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent, is

1. A grinding machine comprising the traveling carriage carrying. adriven part, a power shaft, a counter shaft at each. end of the machinegeared to and driven by said belt running from a pulley on each 0 saidcountershafts' around an idler adjacent to the driven part on saidcarriage, around a pulley on said driven part, back around another idlerand then over a pulley on a yieldingly supported frame at the other endof the machine, substantially as set forth.

2. In a grinding machine, thecombin'ation, of the bed, the travelingcarriage, the slider carrying the grinding wheel mounted thereon, adrive pulley on the spindle of said grinding wheel, a main power shacounter-shaft at each end of the machine, a belt connecting said countershafts and another connecting them with said power ack over anotheridler'and then to the other end of the machine and over a pulleysupported on a yieldingly mounted frame, substantially as setforthQ i 3.In a Y grinding machine, the combination, of the bed, thetraveling-carriage, the

"slider mounted thereon with the grinding wheel spindle mounted inbearin carried thereby, a pulley on said grinding wheel spindle, a mainpower shaft, a counter-shaft at each end of the machine, gearingconnecting each of said counter-shafts to said power shaft, anotherpulley on each of said counter-shafts, a rope belt running from each ofsaid pulleys over a suitably located idler to the ulley on the grindingwheel spindle and t en to a pulley on a yieldingly held frame at the oposite end of the machine, the pulley on the counter-shaft that isbelted'direct to the power shaft being connected to said shaft and tothe pulley by which it is belted to the other counter-shaft by .adifferential gear, substantially as set forth. 1

4. In a grinding machine, the combination, of the bed, the .carriage,the slider on said carriage, the grinding wheel spindle journaled inbearings on said slider, apower shaft, a counter-shaft at each end ofthe machine, one of said counter-shafts being belted to said power shaftand then to the other counter-shaft by a crossed belt, another pulley oneach of said counter-shafts, a belt running from each of said pulleys tothe pulley on the grinding wheel spindle over suitably. located idlers,and then to apulley at the other end of the machine mounted on ayieldingly supported frame, and a differential gear mounted on one ofthe counter-shafts between the pulley. receiving the driving belt andthe pulley carrying the belt running to the grinding wheel spindle,which differential gear connects said pulleys to the shaft and to eachother, substantially as set forth.

5. In a self-contained drive for a indin machine comprising beltsmounted upon pu leys supported upon the machine and running over apulley on the grinding wheel spindle and over yieldingly held pulleys tomaintain tension and permit lengthening and shortening of 'the'belt toaccommodate the movements of the slider, the combination of the drivinbelts mounted upon driven shafts of a differential gear mounted upononeof said shafts between the pulleys there- 'on carrying the belt fortransmitting mo- 6E5v tion to its companion shaft and the pulleycarrying the belt for transmitting motion to the grinding wheel spindle,said differential gear connecting said pulleys to each other and to saidshaft, substantially as set forth.

' 6. In a grinding machine, the grinding' wheel carriage adapted to betraversed, driving shafts located at each end of the ma chlne, pulleysmounted thereon, separate belts connecting each of said pulleys with thepulley on" the grinding wheel spindle, and means for driving the samewithout effecting the traversing mechanism of sad carriage in eitherdirection regardless of the amount of power transmitted, substantiallyas specified.

7 In a grinding machine, the grinding wheel carriage adapted to beautomatically traversed, driving shafts at each end of the machinehaving pulleys, an endless belt connecting each of said pulleys with thepulley on the grinding wheel spindle, said shafts on the ends of themachine being differentially connected to their driving power,'wherebyany variations in the movement of said carriage may be compensated forwithout any influence on the traverse drive in either direction or aneffect on the power transmitted to said grin ing wheel spindleregardless of the amount of power transmitted, substantially asspecified.

8. In a grinding machine, the grinding wheel carriage adapted to beautomatically traversed, driving shafts located at each end of themachine from each of which an equal amount of power is transmitted tothe grinding wheel, and gearing connecting said driving shafts tothe/grinding wheel spindle comprising compensating means by which thepower applied to said grinding wheel exerts the same force in bothdirections eliminating any influence upon the traversing mechanism ofsaid carriage, substan-. tially as set forth.

9. In a machine of the character described, the combination of atraversing carriage, a slider thereon, a part to be driven mounted on .ashaft journaled in bearings on said slider, driving shafts at each endof the machine having pulleys, and endless belts connecting each of saidpulleys with the pulley on the shaft journaled on the slider, each ofsaid belts running to the end of the machine opposite from its drivinmounted upon a yielding y supported idler pulley, substantially as setforth.

10. In a machine comprising a traversing carriage with a transverseslider thereon carrying a part to be driven, the combination of the maindriving shaft, two other driving shafts one located at each end of themachine, a belt connecting the main driving shaft with one of said otherdriving shafts, a belt connecting the driving shafts at each end of themachine, an endless belt running from a pulley on the driving shaft ateach end of the machine to a point adjacent to myhand and seal atWaynesboro, Pennsylthe slider on the carriage, there over idler yenie;this 9th day of April, A. D. nineteen 1 0 pulleys "and around a pulleyo1")1 tilleihaft o; hundreu and six. the part"to be driven onsai i er en5 from thence to the opposite end of thema- A R A N chine and over ayieldingly sufip'orted idler Witnesses: pulley, substantially as setfort Mmz'm RUssnLL,

In witness whereof, have hereunto set ALF. N. RUsenL

